UNI-T LM40Mi Mini Laser Distance Meter User Manual
- June 1, 2024
- UNI-T
Table of Contents
UNI-T LM40Mi Mini Laser Distance Meter
Safety Regulations
Please read the safety regulations and operation guide carefully before operating.
- Please read all of the operational guide and safety regulations in this manual before operation . Improper operations without complying with this manual may cause damage to the device, influence on measurement result or cause personal injury to the user or a third party.
- The instrument is not allowed to disassemble or repair in any ways. II is forbidden to do any illegal modification or performance change for laser emitter. Please keep it out of reach of children and avoid being used by any irrelevant person.
- It is strictly prohibited to shoot eyes or other parts of body with the laser. II is not allowed to take the laser to shoot the surface of any highly reflective objects.
- Due to electromagnetic radiation interference to other equipment and devices, please don’t use the meter in the plane or around medical equipment, don’t use it in inflammable, explosive environment.
- Discarded meter device should not be processed just like household garbage, please handle ii in line with related law and regulations.
- Any quality issues or any questions on the meter, please contact local distributors or manufacturer in time, we are ready to offer solutions for you.
Product Overview
- Laser Emitting Lens
- Laser Receiving Lens
- LCD
- Power/Measure Button
- Mode Switch
- Type-C Charging Port
Display
Start the Instrument / Menu Setting
Tum on/off the Instrument
Under off state, press , device and laser get started simultaneously and the
device enters the measurement mode.
Under on state, long press for 3s to turn off the device, or it will
automatically shut off without any operation within 150 seconds.
Unit Setting
When the laser is turned off, long press to switch the measurement unit. The
default unit is: 0.000m. There are 3 units for selection.
Measurement units:
Length Area Volume
- 0.000m 0.000 m’ 0.000 m’
- 0.0 in 0.00ft’ 0.00ff’
- 0.0011 0.00ft’ 0.O0ff’
Changing Reference Point
When the laser is turned on, long press to change the reference point. The
default reference point is the terminal baseline.
Battery
Built-in 3.7V 370mAh lithium battery, the battery icon will flash when the
battery is low.
Self-calibration & Sound on/off
Self-calibration Function
The self-calibration function is mainly used to correct data. If the deviation
occurs when the user measures the distance, this function can be used for
distance correction.
The correction range is -0.009-0.009m. For example, if the data is 2mm too large, reduce the value by 0.002m; If the data is 2mm smaller, increase the value by 0.002m.Operation:
- Enter self-calibration: In the shutdown state, press and hold the key, and at the same time quickly press the key to start the instrument up, and the screen displays “CAL”;
- Modify calibration value: Press key to increase the calibration value by 1. When the calibration value is equal to 0.009m, increase the calibration value by 1 again and jump to -0.009m.
- Save calibration value: Press to save the current calibration value and enter the sound setting.
Sound on/off
The instrument is equipped with sound prompt function by default. Users can
turn on/ off the sound prompt according to their needs.
- Enter sound setting: Refer to “Self-calibration” to enter the self-calibration. Skip the step of modifying the calibration value, save the calibration value directly to enter the sound setting, and the screen displays “sound”;
- Turn on/off sound: Press to turn the sound on or off. “on” means to turn on the sound, off means to turn off the sound;
- Save settings: Press to save settings and return to the state to be measured.
Single Measurement
Under the test mode, press , and the instrument emits laser to lock the
measuring point. Press again for single distance measurement, and the
measurement result will be displayed in the major display area.
Continuous Measurement
Under the test mode, long press and max/min will flash on the screen, then
release the key to enter the continuous measurement mode, power off in 3
minutes without releasing the button and the maximum and minimum measured
values measured in the continuous measurement process will display in the
auxiliary display area.
The current measurement value will display in the main display area. Short
press or to exit the continuous measurement mode.
Area Measurement
Press , shows at the screen. One of the side of rectangle blinks at the display, please follow the below instructions for area measurement:
Press once for length
Press again for width
The device automatically calculates the area and shows the result in the major display area. The measuring results of the length and width of the rectangle will be showed in the auxiliary display area.
Perimeter Measurement
Press twice, shows at the screen. One of the side of the parallelogram
blinks at the display, please follow the below instructions for perimeter
measurement:
Press once for length
Press again for width
The device automatically calculates the perimeter and shows the result in the major display area. The measuring results of the length and width of the parallelogram will be showed in the auxiliary display area.
Volume Measurement
Press three times to enter volume measurement mode. A will show at the top of
the screen, and its longsides will blink. Please follow the below instructions
for volume measurement:
Press once for length
Press again for height
Press finally for width
The device automatically calculates the volume and shows the result in the major display area. The measuring results of the height and width of the cube will be showed in the auxiliary display area.
Metope Area Measurement
Press four times till shows at the display.
Please follow the below instructions for metope area measurement:
Press once for the height of the wall;
Press again for the width 1 of wall 1;
The instrument will automatically calculate the area of the wall: Area=Height
x Width 1
Press to start the measurement;
Press again for the width2 of wall 2;
The instrument will automatically calculate the total area of the wall:
Total area = Height x (Width 1 + Width 2)
By analogy, press to measure the width(n) of the wall (n);
Total area = Height x(Width 1+ Width 2+ … + Width n)
Pythagoras
There are two Pythagoras modes which is convenient for indirect measurement in a specific complex environment.
-
Calculate the second leg by measuring the hypotenuse and another leg .
Short press five times to enter Pythagoras mode:
Press , measure the length of hypotenuse (a)
Press , measure the length of one leg (b)
Device automatically calculates the length of another leg (x) -
Calculate the hypotenuse by measuring the length of two legs.
Short press six times, one leg of is blinking.
Press , measure the length of one leg (a)
Press , measure the length of another leg (b)
Device automatically calculates the length of hypotenuse (x)
Legs must be shorter than hypotenuse, or there will be “err” showed at screen. In order to guarantee the accuracy, please make sure all measurements are started from the same point and in the order of hypotenuse and legs.
Tips
During use, the following prompts may be displayed in the major display
area:
Prompt
Err Err1
| Cause
Out of the measurement range
Signal is too weak
| Solution
Use the device within the measurement range
Choose the surface with stronger reflection. Use the reflecting plate.
---|---|---
Err2| Signal is too strong| Choose the surface with weaker reflection.
Err3| Low battery voltage| Charge the battery
Err4| Beyond working temperature| Use the device in the specified temperature.
Err5| Pythagoras measuring breaks the rules| Remeasure and ensure that
hypotenuse is longer than legs.
Technology Specifications
| ITEM | LM40Mi **I ****LM50Mi ****I ****LM60Mi** |
|---|---|
| Measurement Range | o.o5-4om I o.o5-5om I 0.05-60m |
| Precision | ±(2.0mm+SXl0-5D)* |
| MCeoanstuinreumouesnt | ✓ |
MMeeatosupereAmrenat
AreaNolume
| ✓
Measurement| ✓
MePaesriumreemteernt Pythagorea| ✓
Measurement| ✓
Min/Max Value| ✓
Laser Level| CLASS II
Laser Type| 630-670nm, <1mW
ACuuttoomffaLtiacasellyr| 20s (single measurement)
150s
Auto Power-off|
Battery| 3.7V 370mAh lithium battery
Full charge measurement times| 8000 times for single measurement
Storage Temperature| -20″C~60″C
Working Temperature| o·c-4o·c
Storage Humidity| 20%~80%RH
Weight| 75g
Dimension| 86.5×36.5×19.5mm
- “d” indicates the actual distance.
** In harsh environments, such as: sunlight is too strong, the ambient temperature fluctuates excessively, the reflection effect of the object’s surface is weak, the battery is low, the measurement results will have a large error, so a reflecting plate is needed.
Instrument Maintenance
- The meter should not be stored in high temperature and humid environment for a long time. If it is not used very often, please place the meter in the box and store it in cool and dry place.
- Please keep the device surface clean. Use a soft wet cloth to wipe the dust on the surface. Do not use corrosive liquid to clean the device. Use the same method as wiping optical devices to wipe the meter and focusing mirror.
Packing List
Please check if all accessories are complete a ccording to the following list.
No.6, Gong Ye Bei 1st Road.
Songshan Lake National High-Tech Industrial
Development Zone, Dongguan City, Guangdong Province, China
Tel: (86-769) 8572 3888
http://www.uni-trend.com